@XmXd7 Yes you can, but it requires the mod tool, simply take all the mod.ff files to the mod file, so they become mod1.ff, mod2.ff, ..., then by using winrar open each .iwd file in the original mods, you will see clientscripts, and maps files, inside each of them you will see the maps GSC, CSC.
what you need is to see what are the extra scripts from each file and combine them into one GSC and CSC, then compile them as mod.ff, and move it to the other mod1.ff, mod2.ff, ..., files and it will work.